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Time synchronization is an essential infrastructure of various applications in sensor networks. In this paper, a time-stamping approach using field-programmable gate array (FPGA) is introduced which is applied to Reference broadcast synchronization (RBS). Then, Dynamic Adjusting Time Synchronization (DATS) protocol is proposed which enables the clock compensation to approach the optimal compensation...
This work examines the feasibility of using Ethernet-based time transfer methods based on White Rabbit technology to discipline all the clock domains of a networked data acquisition system (DAQ). Existing systems provide synchronization capabilities, albeit the performance achieved is often not accurate enough for scientific infrastructures and Smart Grid applications requiring frequency coherent...
Time synchronization (TS) represents an important necessity for many industries in fields such as communications, manufacturing, and power systems related to electrical networks, microgrids, and renewable energies, among others, because it can ensure that cooperating processes or systems can interoperate correctly; further, the scheduling of specific tasks through a timestamp can be done. Among different...
This paper deals with time synchronization in mixed network infrastructures for automation of industrial and electric plants, where old devices, which retrieve time information with the well-known NTP, must coexist with new IEEE1588 PTP compliant devices. Since PTP and NTP use very different time representations and synchronization strategies, an easy integration is quite difficult and requires additional...
Implantable sensor network becomes nowadays an important area of research. Sensors are implanted inside the patient body to measure its physiological changes and send them wirelessly to an external close-by device. Such network is called IWBSN (Implantable Wireless Body Sensor Network). The life time of the embedded batteries associated with these tiny sensor nodes is too short. Hence power consumption...
In order to meet the need to POS for high accuracy real-time motion imaging in the high resolution earth observation system, an integrated navigation computer based on FPGA and DSP was designed. FPGA independently accomplished the synchronous sampling of GPS data and IMU multichannel pulse signals; the bidirectional communication between DSP and FPGA was in the interrupt mode by EMIF; the navigation...
The FPGA technology has been playing a considerable role in portable and mobile communication. This is due to the features of flexibility, accuracy and configurability in designing and implementation. The paper presents a complete design for a 16-QAM transmitter and receiver based on the Virtex4 FPGA Kit. The implemented system can be applied in particle. Based on the principles of carrier synchronization,...
A new solution for time synchronization using GPS receiver signals as reference is proposed. In the GPS/INS applications, unknown time errors between IMU (Inertial Measurement Unit) measurements and GPS time have a significant influence on the data fusion performance of hybrid filter. However, each of exiting methods for time synchronization bears such-and-such shortcomings, for example high cost,...
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